Proto-Turkic: *köpe
Meaning: 1 coat of mail 2 ring of mail 3 earring 4 overcoat 5 saddle-pad for a camel 6 film of egg, exuviae 7 a k. of cloth or carpet
Russian meaning: 1 кольчуга 2 кольцо кольчуги 3 серьга 4 плащ, пальто 5 верблюжье седло 6 пленка яйца, сброшенная кожа 7 вид ткани или ковра
Turkish: küpe 3, kepeneg, köpenek 4, köpen 7
Tatar: küpmɛ 'mattress'
Middle Turkic: köpen (küpen) 5
Khakassian: köbön 'mattress'
Chuvash: kǝʷbe 6
Kirghiz: küpü 'шуба из меха медвежонка'
Kazakh: köpšik 'pillow'
Bashkir: küpmɛ 'mattress'
Comments: EDT 687, 688, 689, ЭСТЯ 5, 48-49, 108 (Tur. köpen being attributed here to a quite different root, see under *köp- 'to swell, foam'), 114-115, 129-130, TMN 3, 581-583. The above forms are hard to separate, and Doerfer's point of view that köpenek is secondarily < kepenek is probably faulty (even though köpenek is attested later: köpen is certainly attested earlier, and an assimilative delabialization *köpenek > kepenek seems quite plausible). The Chuvash form shows that the original meaning of the root must have been 'transparent covering, film', whence 'coat of mail' etc. Turk. > Mong. kebeneg 'saddle-cloth, shirt', Hung. köpönyeg 'raincoat' (Gombocz 1912).
